Frequency Of Aggression Research Articles

Providing Humans With Practical, Best Practice Handling Guidelines During Human-Cat Interactions Increases Cats' Affiliative Behaviour and Reduces Aggression and Signs of Conflict.

The importance of animals' experiences and associated comfort during Human-Animal Interactions (HAI), and particularly Animal Assisted Interventions (AAI), are increasingly recognised. However, there remains a paucity of published research, particularly concerning less formal but frequent HAIs to which companion animals are typically exposed, such as stroking or petting. Additionally, few practical evidence-based guides to facilitate humans' optimal animal handling and interaction in these contexts exist. A simple set of Human-Cat Interaction (HCI) guidelines were therefore created, with the aim to enhance domestic cats' comfort during generic HCI contexts. Based around a “CAT” acronym, guidelines focused on providing the cat with choice and control (“C”), paying attention (“A”) to the cats' behaviour and body language and limiting touch (“T”), primarily to their temporal regions. Guidelines were presented to human participants during a brief training intervention, and guideline efficacy was subsequently assessed. Domestic cats available for rehoming at Battersea Dogs and Cats Home, UK (n = 100) were filmed during interactions with novel members of the public (n = 120). Cats were exposed to a maximum of six, 5-min interaction sessions, balanced across “control” (interactions with humans pre-training) and “intervention” conditions (interactions with humans post-training). For each observation, cat behaviour and posture were coded and humans' cat-directed behaviour rated on the degree to which it reflected best practice principles. Data were extracted from a total of 535 observations and average human interaction ratings and cat behaviour values compared between control and intervention conditions via paired Wilcoxon tests. Compared to the control, humans' interaction styles were rated as significantly more closely aligned with best practice principles in the intervention condition. Cats also displayed significantly greater frequencies and/or durations of affiliative and positively-valenced behaviours in the intervention. In contrast, cats in the control displayed significantly greater frequencies of human-directed aggression, in addition to greater frequencies and/or durations of behaviours associated with conflict and negative valence. Results demonstrate the positive impact of practical interaction guidelines on cats' social behaviour and comfort during HCI, with the potential to improve cats' general experiences during interactions, reduce human-directed aggression and ultimately improve cat-human relationships.

Association of Mental Health and Aggression against Co-Workers in Indian Banks during COVID 19

Most representatives working in banks have been affected severely due to COVID 19 widespread in India. This comprehensive examination's key goal is to carefully examine mental health problems such as anxiety and depression among the bank employees and identify their relationship with aggression against their co-workers during COVID-19 circumstance. A non-probability snowball testing procedure has been utilized to direct online surveys from 536 employees. A moderate level of information has been perceived about COVID 19 among the employees working in banks. Besides COVID-19 related information, anxiety was surveyed by English adaptation of GAD-scale; an English version of CES-D has been used to gauge the depression and aggression against co-workers and is assessed by Conflict Tactics Scales. Affiliations between aggressions against co-workers with mental health problems have been recognized using multiple logistic regressions. The predominance of anxiety and depression is 24.27% and 47.72%, respectively. Additionally, the prevalence of the union of depression and anxiety is 20.81%. 71.1% of participants show frequent aggression against co-workers. The research findings depict that frequent aggression against co-workers was particularly connected with mental health issues during the COVID-19 flare-up. These detections ensnared that the administration needs to consider psychological well-being issues, particularly depression and anxiety among bank employees.

Socially responsible children: A link between school climate and aggression and victimization

Positive perceptions of school climate are associated with lower frequency of peer victimization and aggression in children. Understanding how school climate influences aggression and victimization is essential to guiding school-level interventions to enhance character strengths such as social responsibility. In this short-term longitudinal study, we test a theoretical model arguing that children’s social responsibility mediates the links between their positive perceptions of school climate (comprised of authoritative disciplinary classroom structure, classroom support, and teachers’ use of social–emotional learning [SEL] strategies) and changes in their reports of victimization and aggression, in a sample of Brazilian students in Grades 4 and 5 (N = 1,850). Findings gave some support to our model, particularly in the prediction of aggression. Children’s perceived social responsibility mediated the effects of positive school climate in predicting declines in aggressive behaviors. Specifically, teachers’ use of SEL strategies and classrooms with more structure and support predicted lower levels of aggression through increases in students’ social responsibility. In addition, social responsibility mediated the association between teachers’ use of social emotional strategies and declines in victimization. The direct effect of classroom support on victimization was also significant.

Precoding With Received-Interference Power Control for Multibeam Satellite Communication Systems

Zero-Forcing (ZF) and Regularized Zero-Forcing (RZF) precoding are low-complexity sub-optimal solutions widely accepted in the satellite communications community to mitigate the resulting co-channel interference caused by aggressive frequency reuse. However, both are sensitive to the conditioning of the channel matrix, which can greatly reduce the achievable gains. This paper brings the attention to the benefits of a design that allows some residual received interference power at the co-channel users. The motivation behind this approach is to relax the dependence on the matrix inversion procedure involved in conventional precoding schemes. In particular, the proposed scheme aims to be less sensitive to the user scheduling, which is one of the key limiting factors for the practical implementation of precoding. Furthermore, the proposed technique can also cope with more users than satellite beams. In fact, the proposed precoder can be tuned to control the interference towards the co-channel beams, which is a desirable feature that is not met by the existing RZF solutions. The design is formulated as a non-convex optimization and we study various algorithms in order to obtain a practical solution. Supporting results based on numerical simulations show that the proposed precoding implementations are able to outperform the conventional ZF and RZF schemes.

Impact of the Consequent Containment of Corona Virus on the Frequency of Aggressions in Maxillofacial and Aesthetic Surgery in Marrakesh

On January, the World Health Organization declared that COVID19 was a public health emergency with a currently known overall mortality rate which could be reach 3.4%. The study is retrospective and prospective, comparing two months, 1 month before confinement and 1 month during confinement. The research was conducted within the maxillofacial surgery department of Ibn TOFAIL Hospital at Mohamed VI University Hospital in Marrakech. 1 month before the lockdown, we registered 284 assault patients, who were reported to the total admitted of 1360. 1 month since the establishment of the state of emergency by the Moroccan government, encouraging confinement linked to the Covid 19 infection, we have reported 68 cases of aggression on a global workforce of 360 patients. Since the declaration of confinement in the world as a mode of prevention of COVID-19 infection in the great majority of countries, it has been observed a huge decrease in the number of road accidents, assaults and violence among which maxillofacial aggressions. COVID-19 is a disease of recent onset and very rapid spread that has traced an indisputable impact on the health profile in the world.

Reproductive males are effective at managing conflict in captive Sulawesi crested macaques (Macaca nigra).

Group size, density, and composition significantly influence the expression of agonism and, as demography is frequently manipulated in captivity, natural mechanisms of conflict management may be disrupted. Here, we examine how changes to the social and physical environment of a captive group of Sulawesi crested macaques, Macaca nigra, influenced mechanisms of conflict management. The initial group was comprised of females, juveniles, and castrated males; under a series of management interventions, the group was moved to a new enclosure, 75% of the castrated adult males were removed, 67% of the females were contracepted, a novel, intact male was introduced, and the group was allowed access to an outdoor enclosure. Despite a decreasing trend in aggression following the changes to the social group, we found no significant differences in aggression or intervention behavior in the 5-week periods immediately following changes to the social group, apart from a significant decrease in aggression following the introduction of the novel male. This decrease in the frequency of aggression was still evident 10 weeks after the interventions occurred, and was coupled with a decrease in the intensity of aggression. Moreover, the intensity of aggression as well as the frequency of aggression and intervention were significantly lower under low-density conditions. Our results highlight how management changes to the social and physical environment can influence aggressive behavior, albeit following a period of acclimation. We discuss the relative impacts of social group composition, social density, and individual reproductive status on the management of conflict behavior in a captive setting.

Female emancipation in a male dominant, sexually dimorphic primate under natural conditions.

In most group-living animals, a dominance hierarchy reduces the costs of competition for limited resources. Dominance ranks may reflect prior attributes, such as body size, related to fighting ability or reflect the history of self-reinforcing effects of winning and losing a conflict (the winner-loser effect), or both. As to prior attributes, in sexually dimorphic species, where males are larger than females, males are assumed to be dominant over females. As to the winner-loser effect, the computational model DomWorld has shown that despite the female’s lower initial fighting ability, females achieve some degree of dominance of females over males. In the model, this degree of female dominance increases with the proportion of males in a group. This increase was supposed to emerge from the higher fraction of fights of males among themselves. These correlations were confirmed in despotic macaques, vervet monkeys, and in humans. Here, we first investigate this hypothesis in DomWorld and next in long-term data of 9,300 observation hours on six wild groups of robust capuchin monkeys (Sapajus libidinosus; S. nigritus, and S. xanthosternos) in three Brazilian sites. We test whether both the proportion of males and degree of female dominance over males are indeed associated with a higher relative frequency of aggression among males and a higher relative frequency of aggression of females to males. We confirm these correlations in DomWorld. Next, we confirm in empirical data of capuchin monkeys that with the proportion of males in the group there is indeed an increase in female dominance over males, and in the relative frequency of both male-male aggression and aggression of females to males and that the female dominance index is significantly positively associated with male male aggression. Our results reveal that adult sex ratio influences the power relation between the sexes beyond predictions from socioecological models.

A multilevel examination of lifetime aggression: integrating cortical thickness, personality pathology and trauma exposure.

Aggression represents a significant public health concern, causing serious physical and psychological harm. Although many studies have sought to characterize the etiology of aggression, research on the contributions of risk factors that span multiple levels of analysis for explaining aggressive behavior is lacking. To address this gap, we investigated the direct and unique contributions of cortical thickness (level 1), pathological personality traits (level 2) and trauma exposure (level 3) for explaining lifetime physical aggression in a high-risk sample of community adults (N = 129, 47.3% men). First, the frequency of lifetime aggression was inversely associated with cortical thickness in regions of prefrontal and temporal cortices that have been implicated in executive functioning, inhibitory mechanisms and socio-emotional processing. Further, aggression was positively associated with pathological personality traits (antagonism and disinhibition) and exposure to assaultive trauma. Notably, all three levels of analysis (cortical thickness, pathological personality traits and assaultive trauma exposure) explained non-overlapping variance in aggressive behavior when examined simultaneously in integrative models. Together, the findings provide a multilevel assessment of the biopsychosocial factors associated with the frequency of aggression. They also indicate that cortical thickness explains novel variance in these harmful behaviors not captured by well-established personality and environmental risk factors for aggression.

Exposure to violence and risk of post-traumatic stress disorder in family caregivers of psychotic patients

IntroductionFamily caregivers of psychotic patients are exposed to violence and stress. However, associated psychological outcomes are poorly characterized in this population.ObjectivesThe aim of this study was to clarify the relationship between violence directed towards caregivers of patients with psychosis and developing post-traumatic stress disorder (PTSD).MethodsParticipants were family caregivers of psychotic patients (n=95). They completed a questionnaire assessing sociodemographic characteristics. Sociodemographic and clinical data of patients were collected from medical records. We used the perceptions of prevalence of aggression scale (POPAS) to measure the frequency and severity of aggression directed at the respondent in the past and the Impact of Event Scale-Revised (IES-R) to evaluate PTSD.ResultsA rate of 75.8% of caregivers reported experiencing moderate to severe levels of aggression. Decreased contact with patient (p=0.00), male gender (p=0.00), older age (p=0.00) and parent relationship (p=0.01) of caregivers, diagnosis of schizophrenia or schizoaffective disorder (p=0,00) and poor adherence to treatment (p=0,00) in affected relatives were associated with experiences of moderate–severe aggression. More than a half of caregivers (54.7%) reported potentially significant levels of PTSD which correlated with the level of aggression (p=0.00).ConclusionsOur findings suggest that a large proportion of family caregivers of patient-initiated violence in psychosis reported experiencing a great distress and a high level of PTSD symptomatology. So, more attention should be paid to the support needs of caregivers who are faced with potentially life threatening aggressive behaviour by psychotic family members.

Factors associated with post-traumatic stress disorder in family caregivers of psychotic patients

IntroductionAn association can be found between patient with psychosis and perpetrating acts of violence. So, the caregiving role can impact negatively on psychosis carer psychological health and wellbeing.ObjectivesThe aim of this study was to identify the factors associated with post-traumatic stress disorder (PTSD) in family caregivers of psychotic patients following exposure to aggression.MethodsThis cross-sectional study was carried out involving 95 family caregivers of psychotic patients followed in psychiatry. Data were gathered from caregivers about their experiences in providing care. Sociodemographic and clinical data of patients were collected from medical records.We used the perceptions of prevalence of aggression scale (POPAS) to measure the frequency and severity of aggression directed at the respondent in the past and the Impact of Event Scale-Revised (IES-R) to evaluate PTSD.ResultsThe caregivers were male in 51.6% and with low educational level in 46.3% of cases. A rate of 75.8% of caregivers reported experiencing moderate to severe levels of aggression. More than a half of caregivers (54.7%) reported potentially significant levels of PTSD. Decreased contact with patient (p=0.01), male gender (p=0.00), older age (p=0.00), living far from patient (p=0.00), parent relationship of caregivers (p=0.00), diagnosis of schizophrenia or schizoaffective disorder (p=0.00) and poor adherence to treatment (p=0.00) in affected relatives were associated with the presence of PTSD following exposure to moderate to severe aggression.ConclusionsThese findings highlight the need for interventions to promote family psychoeducation and to provide psychosocial support for caregivers of patients in order to prevent the traumatic impact of violence on them.

The Effectiveness of De-Escalation Techniques as Compared to Physical Restraint/Seclusion on Inpatient Psychiatric Units: A Quantitative Systematic Review

Restraint and seclusion were considered a form of treatment but consistently has led to physical and mental injuries to staff and patients. De-escalation has been viewed as a safer option. Understanding which intervention yields decreased injuries, aggression and violence will guide policy and inform practice. To identify which intervention leads to decreased physical and psychological injury to patients and staff. The frequency of physical injuries to patients and staff from aggressive patients; frequency of psychological injuries to patients and staff from violent, aggressive incidents; frequency of violence, agitation and aggression; competence of staff at managing aggression and violence were evaluated. Fourteen studies were included in this review. There are many forms of de-escalation. Studies where techniques were taught to staff, the intervention was effective in decreasing injury in approximately half the studies. De-escalation techniques taught to patients decreased injury in 100% of the studies included in this review. Consensus on which intervention works best could not be reached, nor is there overwhelming evidence for a particular type of de-escalation better suited for decreasing aggression and violence. Caution should be exercised when choosing a de-escalation technique for implementation in institutions due to lack of regulating agencies that inform practice and standards. In addition, the literature lacks best practices for de-escalation techniques backed by evidence. Restraint and seclusion should be used as a last resort due to inherent risk associated with the intervention.

Binegative Myths in Pornography: An Examination of Sexual Behaviors and Aggression by Sexual Identity Categories

Research suggests individuals may learn sexual attitudes and behaviors from consuming pornography. Sexual minoritized individuals (e.g. gay, lesbian, bisexual) are more likely to use online sources to learn about their identity. Therefore, the content of free online pornographic videos is important to examine. Yet there is limited research on the depiction of sexual minoritized women in pornography. This study compared the frequencies of sexual behaviors and aggression in Heterosexual (n = 594), Lesbian (n = 108), and Bisexual (n = 105) pornographic scenes. Compared to Heterosexual scenes, Bisexual scenes contained higher frequencies of sexual behaviors including fellatio, penile-vaginal sex, and anal sex. Lesbian scenes had the most depictions of female orgasm when compared to Bisexual and Heterosexual scenes, while Bisexual scenes had more depictions of male orgasm when compared to Heterosexual. There was no statistical difference in aggression toward women among categories; Bisexual scenes, however, had more depictions of aggression against men than Heterosexual scenes. These findings suggest binegative myths like hypersexuality are present in pornography.

Model psikologi komparatif ketidaksetaraan jumlah pembagian sumber daya: Studi pada Macaca fascicularis


 This study aims to promote Macaca fascicularis as a comparative psychology model in finding the root and solution of resource inequity by exploring inhibitor effect on refusal behavior, acceptance, and aggression toward the feed distribution numbers in six pairs of female long-tailed macaques. We observed the frequency of refusal behavior, acceptance, and aggression toward the distribution of red grape with a ratio of: a) 1:1, 0:2, 1:3 without environmental inhibitors (with an opened-aclyric tray) and b) ratios 1:1 with an environmental inhibitor (with a transparent restriction box) in 60 trials per condition. The sample size was N = 10. Non-parametric statistical analysis of Wilcoxon Signed-Rank Test showed that 1:1 ratio with environmental inhibitor produces a lower response of refusal behavior compared to 1:3 without inhibitor. It produced a lower response of aggression compared to other ratios. It produced a greater acceptance compared to other ratios. These long-tailed macaques do not accept the equity conditions except with environmental inhibitors. Based on this fact, we conclude that long-tailed macaques are a good spontaneous model for the comparative psychology of inequity.

Behavioral and physiological responses to instability in group membership in wild male woolly monkeys (Lagothrix lagotricha poeppigii).

In group-living species, integrating into a new social group after dispersal is an important life history milestone associated with physical and social challenges. Generally, this process seems to be accompanied by heightened glucocorticoid (GC) concentrations; however, most studies of physiological responses to group transfer have been conducted on species with despotic social relationships, where integrating individuals are often targets of frequent aggression. Here we present data on fecal glucocorticoid (fGC) concentrations during periods of unstable group membership for male woolly monkeys (Lagothrix lagotricha poeppigii), a species with extremely low rates of male-male aggression and generally tolerant male-male associations. We collected data on males in four study groups at the Tiputini Biodiversity Station, Ecuador, and observed three attempted transfer events, involving a total of four adult males, in one study group. We observed only three instances of overt aggression (chases) between males across the entire study period, though male display behaviors were more frequent. We tested whether rates of displays were higher during periods of unstable group membership using a generalized linear mixed model (LMM). We also examined whether male status, group stability, and the occurrence of intergroup encounters affected fGC concentrations using LMMs. Contrary to our predictions, rates of display behaviors were not higher during periods of unstable group membership. However, both transient/integrating males and those who were already group members showed elevated fGC concentrations during these unstable periods. Our results suggest that even in species with tolerant male-male relationships, the integration of unfamiliar individuals can provoke an increase in GCs.

Dominance and Leadership in the Equine Social Structure: A Preliminary Study About Mules and Sex Influence

Little is known about the dominance and leadership behaviors in the social structure of mules (Equus caballus × Equus asinus). Based on the frequency of threat and aggressive behaviors, we compared the social structure, dominance, and leadership of independent groups of mules and horses (n = 11 per group), and filmed the frequency of these behaviors over a period of four days. In both groups, aggressions were uncommon and, when based on threats, the social structure was linear and consistent with males ranking higher in dominance. When compared to horses, mules exhibited some agonistic social interactions without a recognized submissive individual and displayed more specific aggressive behaviors, whereas horses presented more specific threat behaviors. Comparing between groups, mares exhibited more leader behaviors than female mules, in contrast to male horses which showed fewer leader behaviors than male mules. Regarding behaviors within the mule group, males showed more leader and threat behaviors than females, while females showed more frequent aggression. While in horses, the females showed more leader behaviors than male horses and, although there were differences in specific agonistic behaviors, both sexes presented more often threat behaviors. In this preliminary study, we conclude that the social structure of mules, although similar to those of horses, showed to be less stable, since it involves more aggression and agonistic social interactions without a submissive. Moreover, although mules did not present a sex influence on leadership as horses did, they presented it on aggression: females showed more aggression than males.

User Clustering and Optimized Power Allocation for D2D Communications at mmWave Underlaying MIMO-NOMA Cellular Networks

Fifth-generation (5G) cellular networks are being developed to meet the ever-growing data traffic across mobile devices and their applications. The core of 5G cellular networks is leveraging wider and higher frequencies available at millimeter wave frequency (mmWave) bands, thus providing very high data rates for mobile devices. Multi-input multi-output (MIMO) is an essential technology for overcoming the high propagation loss at mmWave communications. In non-orthogonal multiple access (NOMA), multiple cellular user equipments (CUEs) communicate over the same time-frequency resources using a multiplexed power domain. In device-to-device (D2D) communications, two D2D user equipments (DUEs) communicate without passing through the base station. In the underlaying scenario, DUEs reuse the frequency resources allocated to CUEs for spectrum utilization but DUEs cause interferences for cellular and D2D communications. Integrating D2D communications with other 5G technologies has great potential for spectral efficiency improvement. Unfortunately, interference management and resource allocation are becoming increasingly challenging due to aggressive frequency reuse. In this paper, D2D communications at mmWave underlaying MIMO-NOMA cellular network system model is developed. Consequently, a novel resource allocation for D2D communications underlaying MIMO-NOMA cellular network is proposed. A resource allocation optimization problem is formulated for spectral efficiency maximization. To solve this NP-hard problem, the problem is decomposed into three subproblems: interference-aware graph-based user clustering, MIMO-NOMA beamforming design, and optimized power allocation based on particle swarm optimization. Simulation results demonstrate that the proposed algorithm for D2D communications at mmWave underlaying MIMO-NOMA cellular network delivers a greater spectral efficiency compared to the conventional D2D communications that operate underlay MIMO-orthogonal multiple access cellular networks.

Estimation of the Compliance Level of Middle Age Patients with Arterial Hypertension

Non-compliance to treatment recommendations of patients with chronic diseases is a global medical problem that significantly affects the effectiveness of treatment, leading to serious medical and economic consequences. Sufficient research on the problem of non-compliance with medical recommendations has led to the creation of a holistic concept of medical compliance. The purpose of the work was to estimate the main factors influencing the compliance to antihypertensive therapy of middle age patients with Arterial hypertension. Material and methods. We investigated 40 patients 50-60 years old (mean age 56.6±4.5 years) with Essential Arterial hypertension. Socio-demographic, clinical, pathopsychological, psycho-diagnostic methods (Morisky Medication Adherence Scale, self-assessment anxiety scale Charles D. Spielberger – Y. L Hanin, the Scale of Internality in relation to health and illness, the study of the self-esteem of mental states by H. J. Eysenck, the study of the level of depression by the Beck Depression Inventory), mathematical and statistical methods were used. Results and discussion. With the Morisky Medication Adherence Scale survey, we distinguished three groups of patients: with high (22.5%), middle (27.5%) and low (50.0%) levels of adherence to the combined therapy of hypertension. Socio-demographic factors in patients with low adherence to treatment were determined by lower level of education and absence of continuous marital relations. Clinical characteristics of patients with low compliance level included the presence of 3rd degree of severity, I stage of the Arterial hypertension, often comorbidities (Diabetes Mellitus 2nd type, Chronic Obstructive Pulmonary Disease, Ischemic Heart disease), long tobacco smoking. According to the psychopathological and psycho-diagnostic examination, patients with an internal type of personality control, low anxiety and depression mostly showed the low level of compliance and also more frequent aggressiveness in the self-esteem of mental states (p <0.05). Conclusion. Thus, patients of middle age with Essential arterial hypertension very often (up to 78%) showed the insufficient level of adherence to antihypertensive treatment. Socio-demographic, clinical and psychopathological factors significantly affect the level of compliance in these patients. Improving the effectiveness of therapy of Arterial hypertension in such patients is possible due to optimization of treatment regimens, wide introduction of psycho-diagnosis and psycho-correction with the involvement of psychologists into this process

Superior Iterative Detection for Co-Channel Interference in Multibeam Satellite Systems

Aggressive frequency reuse alleviates the frequency-spectrum shortage in multibeam satellite systems targeting multi-Terabits-per-second throughput but creates harsh co-channel interference (CCI) environment. For forward-link, state-of-the-art receivers at user terminals assume memoryless CCI to avoid exponential increase in complexity. However, memory effects of CCI are inevitable, arising when co-channel signals combine asynchronously. First, we provide analytical characterization of CCI accounting for memory, a formulation that captures synchronization impairments. Then, low-complexity receivers, capable of realizing full frequency reuse, are developed to compensate for spatial and temporal CCI profiles, with computational complexity increasing linearly in the memory span. This is achieved by our novel soft-in soft-out, iterative divide-and-conquer (IDAC) paradigm, decomposing interference into smaller sets depending on intensity. A set is created from weak interferers which are not decoded but considered as thermal noise. The interferers which are decoded are further split into a set that subtracts strong ones and another set addressing intense interferers in optimal-Bayesian fashion. Extensive numerical studies reveal that IDAC architecture offers lossless compensation of dominant CCI with memory for beam-edge terminals, when rate coordination is guided by network information theory. Further, its performance is superior compared with approaches using iterative subtractive cancellation, commonly employed for return-link, random-access satellite applications.

Dear enemy effect in the Mexican volcano mouse Neotomodon alstoni: Implications of sex in the agonistic behaviour among neighbours

Two opposite phenomena have been found in territorial animals, the “dear enemy’’ and the “nasty neighbour’’, which refer to individuals that show less aggression toward neighbours than toward strangers and vice versa. However, the need to maintain territory should differ for males and females because sexual reproduction is the result of the different adaptive strategies of the sexes. In this study, we explore territorial behaviour in the context of dear-enemy and nasty neighbour effects in the Mexican volcano mouse (Neotomodon alstoni). Patterns of spatial relationships between individuals and the degrees of agonistic behaviour among neighbours were analysed for a period of one year. Results exhibit a greater spatial proximity between male pairs during the non-reproductive period than during the reproductive period, and greater spatial proximity between pairs of females during the reproductive period than during the non-reproductive period. The analysis of agonistic behaviour showed that there is less tolerance for distant neighbours than for nearest neighbours. However, there is a greater frequency of aggression between male pairs than between females, while females appear to exhibit non-aggressive avoidance among individuals. The results support the theory that Mexican volcano mouse exhibits the "dear enemy phenomenon".

Risk and Resilience among Children with Incarcerated Parents: Examining Heterogeneity in Delinquency and School Outcomes

The present study utilized latent profile analysis with 1088 children with incarcerated parents to identify heterogeneity in behavioral and social problems. Four profiles were observed. The majority (61%) were well-adjusted with low behavioral problems at school and less affiliation with antisocial friends. Youth classified as overactive (20%) displayed frequent disruptive and hyperactive behaviors, while isolated youth (14%) exhibited high loneliness and depression and were most likely to be bullied. Youth in the aggressive profile (7%) exhibited frequent aggression, school behavioral problems, and affiliation with antisocial friends. Although the aggressive profile represented the smallest proportion of the sample, their level of delinquent behavior and number of negative school outcomes were the most concerning. Examination of risk and protective factors by profile found overactive and isolated youth to be more likely to have two or more adults in the household compared to well-adjusted and aggressive youth. Meanwhile, well-adjusted youth had significantly higher school connectedness, parent support, and positive teacher relationships. Aggressive youth were least likely to be raised by a married caregiver. Universal behavioral assessments of children with incarcerated parents would be useful in identifying youth at risk for escalating or persistent delinquency or hyperactivity.